Energy

25 mg of chelated iron (Ferrochel bisglycinate) in a small, NSF Certified for Sport capsule; gentler than iron salts for most, but only for people who need iron.

A fully transparent, Informed Choice-certified pre-workout with 8 g citrulline malate, 4 g beta-alanine and a moderate 200 mg of natural caffeine.

A best-selling 1,000 mcg cyanocobalamin tablet at about 5 cents a day; small and easy to swallow, with no third-party seal.

Fully dosed and naturally sweetened: 8 g citrulline malate, 3.6 g beta-alanine and a hefty 350 mg of caffeine balanced by 350 mg of L-theanine.

One of the most heavily dosed pre-workouts: per scoop 5 g citrulline, 2.5 g creatine and 200 mg caffeine, doubling to 400 mg caffeine at the 2-scoop max.

A fully disclosed, clinically dosed pre-workout (300 mg caffeine, 6 g citrulline, 3.2 g beta-alanine) wrapped in GHOST's popular licensed candy flavors.

An Informed Sport-certified, vegan pre-workout with 274 mg natural caffeine and 6.5 g citrulline, though its beta-alanine and creatine are under-dosed.

The drugstore benchmark: one tablet with 24 nutrients near 100% DV, including iron, iodine and folic acid, for about six cents a day. No third-party seal.

A TikTok Shop best-seller with solid citrulline and beta-alanine doses and licensed candy flavors, but caffeine ranges from 300 to 390 mg by flavor.

A flavor-first, beginner-friendly pre-workout with 200 mg caffeine and 200 mg L-theanine; its pump and endurance ingredients are lightly dosed.

NSF Certified for Sport greens drink with a full multivitamin and 10 billion viable cells of five named probiotics, but over $3 a scoop with two proprietary blends.

Portable, sugar-free caffeine gum with a fully disclosed, research-backed pairing: 40 mg of caffeine plus 60 mg of L-theanine in every piece.

A hugely popular caffeinated amino drink: 100 mg natural caffeine plus a 5 g proprietary amino blend led by taurine, glutamine and arginine, so EAA doses are unknown.

America's best-known budget pre-workout: 200 mg caffeine and great flavors, but beta-alanine, citrulline and creatine all sit below research doses.

Real organic dark-roast coffee (about 150 mg caffeine per cup) with 250 mg each of lion's mane and chaga; tastes like coffee, but mushroom doses are modest.

A viral daily pack of greens gummies that delivers a real multivitamin and 6 g of fiber, but the 'superfoods' sit in one 8.7 g blend and the original has 8 g added sugar.

The TikTok-famous 'debloat' greens drink: sweet, cheap per scoop and easy to mix, but built on seven proprietary blends with no probiotic CFU count.

A creamy, low-caffeine (45 mg) instant coffee with collagen and L-theanine; its chaga and lion's mane sit inside a 7.3 g proprietary blend.

A smooth, low-caffeine (48 mg) organic mushroom coffee that went viral, but its 2 g six-mushroom blend is far below doses used in research.

A USDA Organic fruit-and-vegetable powder sold on an aging study that did not show clear benefits; pleasant flavors, but about $3 a scoop with unquantified blends.

A pricey 2 oz nootropic shot with 55 mg caffeine and 10+ adaptogens, but its actives sit in an undisclosed 11.7 g blend and it costs about $5 a shot.

A high-caffeine fat burner (265 mg per serving, up to 530 mg a day) with yohimbe and green coffee. Weak weight-loss evidence and a history of liver-injury cases.